Seti May Have Received Its First Reply : SCI FI PI // SCI FI Channel

Coolest possible alien news (although probably really not) for a while. A meeting at the American Astronomical Soceity (it's 213th) has provided the platform for NASA to reveal that they've picked up a radio signal six times more powerful than all previous radio signals PUT TOGETHER - and they haven't yet been able to narrow it down to a natural source. Which means only one thing. Aliens. Or, something really, really cool. And big. Here's what space.com had to say about it: "Many objects in the universe, including stars and quasars, emit radio waves. Even our home galaxy, the Milky Way, emits a static hiss (first detected in 1931 by physicist Karl Jansky). Other galaxies also send out a background radio hiss. But the newly detected signal, described here today at the 213th meeting of the American Astronomical Society, is far louder than astronomers expected. There is "something new and interesting going on in the universe," said Alan Kogut of NASA's Goddard Space Flight Center in Greenbelt, Md. A team led by Kogut detected the signal with a balloon-borne instrument named ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission). In July 2006, the instrument was launched from NASA's Columbia Scientific Balloon Facility in Palestine, Texas, and reached an altitude of about 120,000 feet (36,500 meters), where the atmosphere thins into the vacuum of space. ARCADE's mission was to search the sky for faint signs of heat from the first generation of stars, but instead they heard a roar from the distant reaches of the universe. "The universe really threw us a curve," Kogut said. "Instead of the faint signal we hoped to find, here was this booming noise six times louder than anyone had predicted." Detailed analysis of the signal ruled out primordial stars or any known radio sources, including gas in the outermost halo of our own galaxy. Other radio galaxies also can't account for the noise – there just aren't enough of them. "You'd have to pack them into the universe like sardines," said study team member Dale Fixsen of the University of Maryland. "There wouldn't be any space left between one galaxy and the next." The signal is measured to be six times brighter than the combined emission of all known radio sources in the universe. For now, the origin of the signal remains a mystery. "We really don't know what it is,"said team member Michael Seiffert of NASA's Jet Propulsion Laboratory in Pasadena, Calif. And not only has it presented astronomers with a new puzzle, it is obscuring the sought-for signal from the earliest stars. But the cosmic static may itself provide important clues to the development of galaxies when the universe was much younger, less than half its present age. Because the radio waves come from far away, traveling at the speed of light, they therefore represent an earlier time in the universe. "This is what makes science so exciting," Seiffert said. "You start out on a path to measure something – in this case, the heat from the very first stars – but run into something else entirely, some unexplained."